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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#627556 | #8339. Rooted Tree | Fei | AC ✓ | 1211ms | 3704kb | C++17 | 833b | 2024-10-10 16:18:28 | 2024-10-10 16:18:28 |
Judging History
answer
#include<bits/stdc++.h>
using i64 = long long;
const int mod = 1000000009;
i64 ksm (i64 a, i64 b) {
i64 res = 1;
while(b) {
if (b & 1) {
res = res * a % mod;
}
a = a * a % mod;
b >>= 1;
}
return res;
}
void solve() {
i64 m, k;
std::cin >> m >> k;
i64 a = 1, n = m;
i64 ans = m;
for(int i = 1; i < k; i++) {
ans = (ans + (a + 1) * m % mod) % mod;
a = ((n - 1+mod)%mod * a % mod + (a + 1)%mod * m%mod)%mod;
n = (n - 1 + m) % mod;
a = a * ksm(n, mod - 2) % mod;
}
std::cout << ans << '\n';
}
signed main() {
std::ios::sync_with_stdio(0);
std::cout.tie(0);
std::cin.tie(0);
i64 t = 1;
// std::cin >> t;
while (t--) {
solve();
}
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3704kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3584kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 75ms
memory: 3576kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 813ms
memory: 3580kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 887ms
memory: 3624kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 497ms
memory: 3640kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1199ms
memory: 3584kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 215ms
memory: 3584kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 659ms
memory: 3700kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 386ms
memory: 3648kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 354ms
memory: 3660kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1044ms
memory: 3640kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1211ms
memory: 3648kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1211ms
memory: 3580kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1210ms
memory: 3576kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed